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← ScienceWhich mechanism limits conductivity when electrons populate anti-bonding bands in doped semiconductors?
A)Increased electron-phonon scattering✓
B)Reduced crystal lattice symmetry
C)Enhanced electron tunneling probability
D)Augmented electron-hole recombination
💡 Explanation
Populating anti-bonding bands destabilizes lattice structure, increasing electron-phonon scattering which hinders electron mobility. Because scattering impedes electron flow, higher resistance emerges, therefore conductivity decreases rather than increase from excess carriers.
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